Anyone else feel it? It was the first one I actually felt and they don't happen too often here in the NE.

I was sitting at my desk and felt the building start shaking, I work on the first floor in an apartment building so I though maybe someone was jumping or wrestling around. (My maintenance guy told me he felt it and thought at first it was tenants messing around too!)Then I realized that kind of shaking could not done by humans. My computer moniter was shaking, my plant was shaking, I was shaking! Pretty Crazy!